Filter and manual fuel pump for carburetor



June 25, 1968 A. SIEGER 3,389,801

FILTER AND MANUAL FUEL PUMP FOR CARBURETOR Filed May 19, 196

. MANUAL FUEL Pump ARBURETOR I 20 l I 2 MAIN [FILTER FUEL] PUMP V 4 1 ii{/8 FUEL TANK INVENTUR. AL BERT SIEGEA ATTORNEY United States Patent3,389,801 FILTER AND MANUAL FUEL PUMP FOR CARBURETOR Albert Sieger, 4180SW. 9th St, Miami, Fla. 33134 Filed May 19, 1966, Ser. No. 551,455 4Claims. (Cl. 210-135) ABSTRACT OF THE DISCLOSURE A combined fuelfilter-and-manual pump unit comprising a single housing having adjacentelongated filter and pump chambers connected by a passage extendingthrough a common wall and communicating with a lower portion of saidpump chamber and a lower intermediate portion of said filter chamber, aremovable filter cartridge in said filter chamber including inlet andoutlet portions whereby fuel must flow therethrough, said filter chamberincluding a floor portion below said passage, forming a sludgecollection portion serving both said filter and pump chambers, said pumpchamber including valve means opening toward said passage and an inletdirecting fuel into said pump chamber above said valve means, a secondvalve means in said inlet opening toward said pump chamber permittingfuel to flow therein, and a manually operated piston in said pumpchamber above said first mentioned valve means and subject to fuelpressure in said pump chamber under normal operating conditions wherebythe piston is normally urged to the upper portion of said pump chamberand the pump chamber is filled with a substantial primer charge of fuelto be expressed manually toward the filter chamber by said manuallyoperated piston.

This invention relates to an improved filter and manual fuel pumpincluding a check valve for inclusion in the fuel line of automobilesbetween the carburetor and fuel pump.

The instant invention provides an improved gasoline filter and manualpump for inclusion intermediate the main fuel pump and the carburetor ina fuel delivery system, which is to be positioned above the level of thefuel pump. The filter and pump includes a valve intermediate the filterportion of the device and the manual fuel pump portion of the device torestrict gasoline flow therethrough with the valve member being normallyclosed and adapted to be opened (a) to permit gasoline to flow to thefilter and carburetor when the main fuel pump is operating, or (b) whenthe fuel pump is not operating, to open in response to activation of themanual fuel pump, which includes a piston means to open the valve whilesimultaneously closing and restricting the inlet passage so that fuel inthe fuel body may not pass down stream but only to the filter.

It is a general object of this invention to provide a device forautomobiles which will permit of improved starting for an automobilewhich is out of gas in the carburetor and a portion of the fuel line forthe reason that it will restrict the back flow of gasoline in the fuelline and is adapted to pump fuel to the carburetor to result in quickerstarting.

It is a general object of this invention to provide a device of the typedescribed which is simple in construction, economical to manufacture,and is otherwise well adapted for the purposes set forth.

In accordance with these and other objects which will become apparenthereinafter, the instant invention will now be described with referenceto the accompanying drawings illustrating a preferred embodimentthereof:

In the drawings:

FIG. 1 is a schematic view of a filter and check valve 3,389,801Patented June 25, 1968 ice arrangement of the instant invention inrelation to a carburetor, fuel pump and main reservoir tank for anautomobile; and

FIG. 2 is an enlarged cross-sectional view taken medially of the checkvalve and filter indicated in FIG. 1 with the arrowed line 22therearound.

Referring to the drawings wherein like reference characters designatelike or corresponding parts throughout the different views, andreferring particularly to FIG. 1, which is a schematic view of the fuelpump system of a motor vehicle having the instant invention installed,the numeral 12 represents a carburetor and the numeral 14 represents afuel reservoir or tank. Intermediate the carburetor and the tank a fuelpump 16 is provided for causing a pressure differential to draw the fuelfrom the tank through the conductor lines 18, 20 and 22. The instantinvention comprises the combination of the filter 24 and the manual fuelpump and the check valve 26 adjacent the filter which are, as indicatedin the schematic drawing, positioned, when installed, above the plane ofthe fuel pump for a reason which will become apparent hereinafter.

Referring now to FIG. 2, it will be seen that the fuel filter comprisesa housing 28 having an inlet port at the lower end 30 and an outlet portat the upper end 32 which lead into a main chamber 34 which is adaptedto be closed by a cap 36 which, as indicated, is threaded for threadedengagement as at 38 with the interior upper lip of the housing. Withinthe housing the filter unit, generally designated by the numeral 40, isprovided; the filter unit comprises a cartridge frame 42 sized forinsertion into the central chamber of the housing and provided with aplurality of peripheral grooves 44, 46, 48 and 50 which seat neopreneO-rings 51, 52, 53 and 54, which, when the cartridge is assembled in thehousing, tightly engage and nestle against the side walls of thehousing. A cushion block such as 56 may be provided in the floor 58 ofthe housing so that the cartridge will rest thereon. The cartridge maybe provided with various types of filtering mediums in stacked annularmembers which are connected together by a relatively long headed screw66 and a nut 68 which threadably screws on the end of the screw 66 todraw various elements, such as 70, 72, 74, 76 and 78 together into closeabutting relation. The upper and lower elements 70 and 78 respectivelyare provided with perforated outer walls to permit of fluid flow betweenthe inlet and outlet ports and the respective elements while each of theelements are provided with abutting surfaces which permits of fluid flowthrough the various filtering mediums of the cartridge. It is preferredthat the first filtering medium be of a material spaced above the floor80 of the cartridge, to facilitate sludge collection, which willpre-filter and remove moisture from the fuel. The various other levelsof the filter may include conventional filtering materials and acharcoal filter for the purpose of degreasing the gasoline and renderingit more pure. It will be readily apparent that the cartridge may beremoved as a unit simply by removing the cap 36 from the housing andpulling the cartridge as a unit from the interior of the housing. Inthis manner one may change the cartridge, or, indeed, substitute aditferent filtering medium for one in the cartridge assembly by simplyremoving the nut 68 from the end of the headed screw 66 and replacingone of the elements of the cartridge.

Preferably assembled on the filter, a manual fuel pump and check valvestructure generally designated by the numeral 26 is provided, the body82 of which includes a central cylindrical chamber 86, the interiorwalls of which are provided with a valve seat 88 dividing the interiorchamber into an upper portion 90 and a lower portion 92. An inlet port94 is provided for the upper portion and an outlet port 96 is providedfor the lower portion, there being an integral of otherwise suitablyarranged connector pipe 100 to connect the body 82 to the filterhousing, which in this embodiment is a simple passageway in the bodyconnection to the filter housing. A piston 102 is provided in the upperportion 90 and is slidable with respect to the axial bore 104 in thevented cap 106 to move a neoprene gasket head 108 on the inner end ofthe piston vertically to act as a pump or push force on liquid in theupper portion. On the valve seat 88 a valve plate 110 is provided whichis normally urged by spring means 112 to seat on the lower surfaces ofthe seat, the spring 112 being held in place by a retain' g frame member116 in the lower portion. A replacaole liner 122 for the body may beprovided which is of suitable material. It will also be noted that inthe inlet of the manual fuel pump or check valve body, another valve isprovided which comprises a ball 126 which is captivated in the chamber128 between a pin 130 and the end 132 of the fitting which may bedischarged so that pressure in the body 82 will force the ball to seatand block entrance of gasoline into the body 82 while a force is beingapplied to the piston.

It is thus seen that so long as the carburetor is provided with fuelfrom the fuel tank by reason of the action of the fuel pump the enginewill continue to operate. When the fuel tank supply has been exhaustedthe fuel pump will cease to provide sufiicient pressure to keep thevalve 110 open and, consequently, a fuel supply captivated in the body82 will be trapped. During the operation of the a motor vehicle, thepiston 102 will have been gradually raised upwardly by the pressure ofthe fuel in the main upper chamber 90 pressing against the piston heador gasket 108. Thereafter, to start the automobile once the fuel tankhas been recharged, there is a problem in drawing sufiicient fuelthrough the line to start the engine automatically. The fuel line may beprimed by pushing downwardly manually on the piston 102 with suflicientforce so that two things will happen simultaneously: the fuel in thereservoir 82 will be forced into the filter housing and the ball will bebrought against the end 130 of inlet port 94 of the pipe to constrainthe fuel trapped in the upper chamber 90 to one direction of movementonly in response to the pressure or force of the piston head 108. It isthus seen that the carburetor will immediately be supplied with thegasoline in the line 22, the filter 24 and the reservoir 90 of themanual fuel pump and check valve to immediately start the engine and,consequently, the fuel pump. This will result in an immediatereplacement of the normal supply of fuel in the line 18 and willgradually refurnish a supply of extra fuel in the upper chamber 90 bycausing the piston to gradually retreat upwardly to the rechargedposition so that the next time the vehicle runs out of gas it may bereadily started again in a similar manner. The reservoir of the upperchamber 90 is at least equal to the cup of the carburetor for thevehicle on which it is mounted so that there will be sufiicient fuelsupply to it.

While the instant invention has been shown and described herein in whatis conceived to be the most practical and preferred embodiment, it isrecognized that departures may be made therefrom within the scope of theinvention, which is therefore not to be limited to the details disclosedherein but is to be accorded the full scope of the claims so as toembrace any and all equivalent apparatus and articles.

What is claimed is 1. In a fuel delivery system for an internalcombustion engine including a fuel supply, main fuel pump and carburetorconnected in series, the improvement comprising: a combined fuelfilter-and-manual fuel pump unit comprising a unitary housing includingadjacent, parallel, elongated filter and pump chambers having a commonwall and respectively connected at intermediate and lower portions to apassage extending through said common wall,

said housing including an upper outlet communicating with said filterchamber for connection in series to the carburetor,

said housing including an inlet having a portion for connection inseries with said main fuel pump, said inlet communicating with anintermediate portion of said pump chamber, a filter cartridge removablyretained in said filter chamber and including an intermediate inletcommunicating with said passage and an upper outlet communicating withsaid chamber outlet, said filter cartridge including a lower sludgecollecting portion below said passage,

said pump chamber including first one-way valve means biased to openonly toward said filter chamber and disposed below said inlet to saidpump chamber, a second one-way valve means in said inlet and openingonly toward said pump chamber, and a manually-operable pistonreciprocably supported in said pump chamber above said valve meanswhereby normal fuel pressure in said system fills said pump chamber withan emergency charge of priming fuel and positions said piston at anupper portion of said pump chamber to permit said priming charge of fuelto be readily directed through said filter chamber to a carburetor.

2. The structure as claimed in claim 1 in which said filter and pumpchambers, respectively, include removable closure caps affording readyaccessibility to said piston and filter cartridge.

3. The structure as claimed in claim 2 in which said pump chamberincludes an inner sleeve retained therein by the closure cap of saidpump chamber, said first oneway valve including an apertured valve seatengaged by a lower portion of said sleeve and retained in position bysaid sleeve, a valve plate disposed beneath said valve seat, a framedepending beneath said valve seat, and a spring engaged between saidframe and said plate and normally urging said plate into engagement onsaid apertured valve seat.

4. The structure as claimed in claim 2 in which said filter cartridgecomprises a stack of axially disposed filter elements, and meansextending axially of said stack of filter elements and removablyretaining the same in a stack and permitting interchangeability of saidfilter elements.

References Cited UNITED STATES PATENTS 2,330,558 9/1943 Curtis l5836.42,414,158 l/1947 Mock l5836.4 2,773,492 12/1956 Klemm 123136 FOREIGNPATENTS 159,533 9/1940 Austria.

FREDERICK KETTERER, Primary Examiner.

